Not to turn this into a Q1 appreciation thread, but I find it's a miraculous little device. Undetectable noise floor even at full blast and when listening through sensitive headphones, battery life that with my usage pattern seems to be measured in days rather than hours, enough output to power any headphone in my (admittedly modest) collection, and, since it's a DAC + amp combo, a simple micro USB cable* is all that's needed to plug it into a wide variety of sources.
This is one of those kinds of devices I think every aspiring personal audio fan should have (if not the Q1 specifically, then something comparable), as it's a nice quick solution to getting good output and quality audio without having to worry about whether or not what you're plugging it into can manage this on its own. It's also relatively inexpensive and should give a pretty good idea what a given headphone is capable of, so it would work well as a starter amp for somebody who isn't quite sure how far they want to delve into personal audio and just wants to try out a particular headphone without spending a ton of extra money. Even if they later upgrade their setup, I can still see something like this being useful for all the previously stated reasons.
*USB C presents a bit more of a challenge, as it requires an adapter on one end of the cable, and if you're using it with a phone, you'll need one that supports OTG--these aren't very common as of yet, but they do exist. And, obviously, if you're plugging it into something with full-sized USB A ports, you'll need a micro USB to USB A cable rather than one with micro USB terminations on both ends.
. I read on kent rockwell's site that he wrote the load of the dt880 is resistive and that makes them easy to drive, i don't know what he means by that, but I think it also has to do with why it isn't affected by the amp's impedance as much, is that right?
